County annual report · FIPS 46105
2020 Perkins County, SD Power Outage Report
In 2020, customers in Perkins County, SD went without power for an average of 14.2 hours, a total of 13K customer-hours (South Dakota average 4.6 hours). That ranks 5th worst of 62 South Dakota counties and 587th of 3,019 nationally.
Compared with SD, the US and 2019
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Perkins County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 19, 2020 20:15 | June 19, 2020 20:45 | 30m | 773 | 207 |
| 2 | February 28, 2020 17:15 | March 4, 2020 15:15 | 4d 22h | 369 | 300 |
| 3 | October 6, 2020 18:15 | October 6, 2020 21:30 | 3h 15m | 293 | 952 |
| 4 | March 17, 2020 16:45 | March 17, 2020 17:00 | 15m | 291 | 73 |
| 5 | May 12, 2020 20:30 | May 12, 2020 22:00 | 1h 30m | 280 | 256 |
| 6 | May 13, 2020 00:30 | May 14, 2020 13:30 | 1d 13h | 261 | 167 |
| 7 | July 17, 2020 19:45 | July 17, 2020 23:15 | 3h 30m | 201 | 444 |
| 8 | August 7, 2020 04:30 | August 7, 2020 07:30 | 3h | 163 | 166 |
| 9 | December 23, 2020 10:30 | December 23, 2020 11:30 | 1h | 153 | 119 |
| 10 | May 24, 2020 02:00 | May 27, 2020 19:15 | 3d 17h | 137 | 415 |
Outage episodes by size in 2020: 15 reached 100+ customers, 0 reached 1,000+ customers, 0 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Perkins County reported on EIA Form 861 for 2020, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Montana-Dakota Utilities Co | - | - | - | - | - |
| Grand Electric Coop, Inc | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 79% of South Dakota's customers in 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 890 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Perkins County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Perkins County, SD annual power outage report, 2020, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/). https://massoutage.com/reports/2020/south-dakota/perkins-county